Question about 1999 Chevrolet Camaro

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Head light dimmer switch will not go to high beam

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Isolate the wire that comes from the headlight switch to the headlamp bulbs for high beam and check to see if there is a short in the wire. You can find this wire by using a test light turn on the key and get a good ground with the test light poke the wire and see if the test light illunimates with the headlight switch on.If all checked ok then either the dimmer switch is faulty or the headlight switch is faulty.The switch actually works partially ,they get internally short. It has to be checked and replaced. Thanks. keep updated for any more query.you can rate this solution and show your appreciation.

Posted on Aug 03, 2010

  • Ron Wagner Aug 04, 2010

    need location of dimmer switch and headlight switch

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Posted on Jan 02, 2017

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2007 chev sub head lights wont turn on


Do you know anything about automotive electronics ? Electronic control modules .
Headlamp ON/OFF control is determined by the body control module (BCM) by a signal on the headlamp switch on input circuit when the headlamp switch is in the HEAD position. When the headlamp switch is in the AUTO position, the BCM determines headlamps ON/OFF by the voltage from the ambient light sensor.
If the headlight switch is left in the ON position, the inadvertent power control feature will turn OFF the headlights approximately 10 minutes after the ignition switch is turned to the OFF position. If the driver places the headlight switch in the ON position after the ignition switch has been turned OFF, or if the ignition switch is in the ACCY position, the headlights will remain ON until turned OFF or the battery runs dead.
The high beam indicator is illuminated when the instrument cluster receives a GMLAN serial data message from the BCM that the high beams are illuminated.
High Beams
The high beam headlamps receive voltage from the headlamp high relay located in the underhood fuse block. The BCM controls the relay on the headlamp high beam relay control circuit. High beam control is determined by a signal on the headlamp dimmer switch signal circuit from the multifunction switch. When the headlamp dimmer switch signal circuit is grounded, the BCM grounds the headlamp high beam relay control circuit, illuminating the high beam headlamps. The right and left high beam circuits are independent and are fused independently in the underhood fuse block.
Low Beams - Standard
The low beam headlamps receive voltage from the headlamp low beam relay located in the underhood fuse block. The BCM controls the relay on the headlamp low beam relay control circuit. Low beam control is determined by a signal on the headlamp dimmer switch signal circuit from the multifunction switch. When the headlamp dimmer switch signal circuit is open, the BCM grounds the headlamp low beam relay control circuit, illuminating the low beam headlamps. The right and left low beam circuits are independent are fused independently in the underhood fuse block.

Hooking up a factory scan tool an checking DTC'S - diagnostic trouble codes would be the very first step in trouble shooting this problem .
DTC B257A 00: Headlamp Switch Input Signal Mismatch
DTC 2575 00: Headlamp Control Circuit

Jun 30, 2017 | Cars & Trucks

1 Answer

Low beam works high beam don't work new bulbs and new switch


Did you check the dimmer switch for power ?

Nov 28, 2015 | 1997 Toyota T100

1 Answer

THE LOW BEAM WORK BUT THE HIGH BEAM DON'T DASH LIGHTS VERY DIM


YOUR DIMMER SWITCH HAS SHORTED OUT CAUSING IT TO STAY IN THE CLOSED POSITION THE DIMMER SWITCH OR ACTUTATOR IS LOCATED UNDER THE STEERING WHEEL PANEL JUST ABOVE THE BRAKE PEDAL ON THE COLUME CALL OR GET ON LINE TO AUTO ZONE AND LOG ON AND YOU CAN GET A PRICE CHECK FOR A DIMMER SWITCH ACTUATOR LISTED UNDER PARTS REPLACEMENT IN THE ELECTRICAL SECTION

Mar 27, 2014 | 2003 Cadillac CTS

1 Answer

My 2002 impala headlights don't work at night or in dark places like a tunnel or under a bridge, they only work in the day time. I have day time runner lights and they automatically turn on when I start my...


You can't turn them on manually with the switch . You have the switch set on auto ?
Headlamps
You can use the headlamps in two different ways.
• Place the headlamp switch in the ON position for normal operation.
• Place the headlamp switch in the OFF position for automatic lamp control (ALC). During ALC the high beam headlamps are On at reduced intensity for daytime running lamp (DRL) operation in daylight conditions, or low beam headlamps On in low light conditions.
The DRL/EXT LTS fuse and the EXT lamps fuse in the underhood junction block supply battery positive voltage at all times to both of low beam lamps and to the right high beam lamp. The low beam circuit continues to the high/low beam switch, then, depending on the position of the dimmer switch, connects to the normally-open headlamp relay switch contacts. Placing the headlamp switch in the HEAD position provides a ground path for the headlamp switch input of the Body Control Module (BCM). After receiving this input, the BCM energizes the headlamp relay. When the headlamp relay is energized, the low beam circuit is connected to ground G201. The high beam circuit is divided into a left and a right side circuit.
The DRL/EXT LTS fuse in the underhood ignition block supplies battery positive voltage to both the coil and to the normally-closed contact of the DRL relay switch circuit. During high beam operation, the left side current flow is through the closed contacts of the DRL relay, and to the left high beam lamp.
The EXT Lamps fuse in the top of the engine fuse block supplies battery positive voltage to the right high beam lamp. Both high beam circuits are then connected together, and continue to the dimmer switch. When the driver closes the high beam contacts of the dimmer switch, the circuit is grounded at G201.
Both the headlight switch and the BCM provide a ground, or control circuit, to the headlight relay coil circuit for manual or automatic headlamp operation. When you place the headlamp switch in the OFF position, and the ambient light sensor indicates low light conditions, the BCM energizes the headlamp relay for low beam operation. You may switch the headlights to high beam by pulling the dimmer switch handle toward you until the dimmer switch is activated. When the dimmer switch is placed in the HIGH position, the indicator lamp input to the BCM is pulled low. The BCM then sends a class 2 message to the instrument cluster in order to illuminate the high beam indicator lamp.
If the headlamp switch is left in the head position, the inadvertent power control feature will turn off the headlights 10 minutes after you turn the ignition switch to the OFF position. If you place the headlamp switch in the head position after the ignition switch has been turned OFF, or if the ignition switch is in the ACCY position, the headlights will remain ON until you turn them OFF or until the battery runs dead.

Dec 07, 2017 | Chevrolet Impala Cars & Trucks

2 Answers

2001 suburban


Well the high and low beam lamps use the same fuses, and the dimmer switch handles the ground circuit. So I would check the dimmer switch if both high beam bulbs are ok.

Jul 23, 2013 | Cars & Trucks

1 Answer

1996 dodge Ram 1500 4x4 headlights dont work.All other lights work. Headlight lamps are all good. Could it be the switch or the multifunction switch? High beam works when I pull on the directional le


The headlight switch gets power for the headlights from a 50amp fuse.
The fuse powers the headlight switch then the dimmer switch breaks for high and low beams. So if the high beams work, the problem may be with the dimmer switch.
The dimmer switch is made into the turn signal switch on the column. You would need to check the low and high beam circuits at the switch for power.

Jan 14, 2013 | Dodge Pickup Cars & Trucks

1 Answer

My 87 k5 blazer headlights don't turn on when the car is started and running any more... all 4 headlights turn on fine when I pull the lever all the way out for high beams


The vehicle should not have to be running for head lights to burn.If high beams work,then the low beam head lights could be burned out,even though they light up with high beams.The dimmer switch,can be the problem if the head lights only work on high beam.

Dec 12, 2009 | 1987 Chevrolet Blazer

1 Answer

Daytime running light working fine but can not switch on the head light? 1998.


Pull the head light switch and check it for out put.Do you have high beams?Check the low beam headlight bulbs.If you have high beams,and low beam bulbs are good,replace the dimmer switch.

Nov 10, 2009 | 1998 Ford Escort

1 Answer

Its reversial for me my high beams wont work what


Good day:
the following is what you can do to test to see whats going on
turn on the headlights,put in high position
2.leave light in high, disconnect the head light dimmer switch, connect a fused jumper between head light relay supply voltage circuit of the dimmer switch and the control circuit of the head light relay. if the high beams come on then replace the dimmer switch, if the high beams don,t come on then.
3.use a fused jumper across the battery positive voltage supply circuit and the switched high beam voltage supply circuit. if the high beam come on now replace the head light relay, if the high beams don't come on then you will have to replace the LH I/P fuse block. I would most likely say that it's the relay just because of the year. I gave you a lot here I hope this helps

Cheers

Jul 08, 2009 | 2002 Chevrolet Monte Carlo

2 Answers

Head lights on 1990 jeep wrangle won't work


Ckeck the headlight connections they are notorious for corroding. Check the ground connection for the lights. Pull your dimmer switch back as if you were flashing a car to pass and see if they work there. If they do you have a dimmer switch problem.

Dec 20, 2008 | 2000 Jeep Wrangler

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